Log4Net.AspNetCore 配置

1.引用 Microsoft.Extensions.Logging.Log4Net.AspNetCore

2.增加配置Program.cs

 public static IWebHostBuilder CreateWebHostBuilder(string[] args) =>
            WebHost.CreateDefaultBuilder(args)
             .ConfigureLogging((hostingContext, logging) =>
             {
                 logging.AddFilter("System", LogLevel.Warning);
                 logging.AddFilter("Microsoft", LogLevel.Warning);
                 logging.AddLog4Net();
             })
            .UseStartup<Startup>();
    }

3.增加配置Startup.cs

public void Configure(IApplicationBuilder app, IHostingEnvironment env, ILoggerFactory loggerFactory)
{
      loggerFactory.AddLog4Net();
}

4.增加配置文件

<?xml version="1.0" encoding="utf-8" ?>
<log4net>
  <appender name="DebugAppender" type="log4net.Appender.DebugAppender" >
    <layout type="log4net.Layout.PatternLayout">
      <conversionPattern value="%date [%thread] %-5level %logger - %message%newline" />
    </layout>
  </appender>
  <!--指定日记记录方式，以滚动文件的方式（文件记录）-->
  <appender name="RollingFile" type="log4net.Appender.RollingFileAppender">
    <!--日志路径-->
    <file value="Log/" />
    <!--是否是向文件中追加日志-->
    <appendToFile value="true" />
    <!--log保留天数-->
    <param name= "MaxSizeRollBackups" value= "10"/>
    <!--每个文件最大1M-->
    <param name="maximumFileSize" value="1MB" />
    <!--日志根据日期滚动-->
    <param name="RollingStyle" value="Date" />
    <!--日志文件名格式为:logs_20080831.log-->
    <param name="DatePattern" value="&quot;logs_&quot;yyyyMMdd&quot;.log&quot;" />
    <!--日志文件名是否是固定不变的-->
    <param name="StaticLogFileName" value="false" />
    <!--布局-->
    <layout type="log4net.Layout.PatternLayout">
      <conversionPattern value="%date %5level %logger.%method [%line] - MESSAGE: %message%newline %exception" />
    </layout>
  </appender>
  <root>
    <level value="ALL"/>
    <appender-ref ref="DebugAppender" />
    <appender-ref ref="RollingFile" />
  </root>
</log4net>

原文地址：https://www.cnblogs.com/prolion/p/11328101.html